Getting Linux OS

You will need

USB multi reader having a MicroSD slot which can support high speed data transfer

PC or Mac

Getting Ubuntu

This is done on a PC.

Ubuntu OS Image can be downloaded from hardkernel.com.
In more detail here: Ubuntu.
Please check the latest version of the OS.

To install, or “flash”, Ubuntu OS to the memory card (eMMC module or micro SD card), we recommend using etcher.
You can download Etcher from https://etcher.io/

Etcher works on Mac OS, Linux and Windows, and is the easiest option for most users. Etcher also supports writing OS images directly from the zip file, without any unzipping required.

Burning the Ubuntu

EMMC

micro SD Card

When OS installation is complete on the memory card, connect the HDMI cable to your ODROID-C2, then plug the power supply.
After a few seconds, you can see the Ubuntu booting progress.It reboots for the first time boot. Just wait a few more seconds
Default ID and password of the official Ubuntu OS are both “odroid”.